Pattern for casting band and other rings and parts thereof



A. WENDT. PATTERN FOR CASTING BAND AND OTHER RINGS AND PARTS THEREOF.

I APPLICATION FILED AUG-6,1919.

1,358,906. Patented Nov. 16, 1920.

INVENTOR WITNESSES UNETFED STATES PATENT ()FFICE.

ALFRED WENDT', OF FRESNO, CALIFORNIA.

PATTERN FOR CASTING BAND AND OTHER RINGS AND PARTS THEREOF.

Specification of Letters Patent.

Patented Nov. 16, 1920.

Original application filed October 1, 1918, Serial No. 256,402. Divided and this application filed August 6, 1919. Serial No. 315,677.

T all w from it may concern:

Be it known that I, ALFRED WENDT, a citizen of Germany, residing at Fresno, in the county of Fresno and State of California, have invented certain new and useful Improvements in Patterns for Casting Band and other Rings and Parts Thereof, of which the following is a specification.

This invention has reference to patterns for casting band and other rings and parts thereof, and its object is to provide patterns representing substantially half the width of the ring as measured from edge to edge and with the inner periphery of the ring patterns the same irrespective of the shape of the finished rings, or the ultimate size of the ring. The patterns may all have a standard internal diameter, say about No. 2:; of the ring gage, the internal diameter of the cast ring being afterward increased by the use of a ring stretcher.

By making the patterns all of a standard internal diameter the number of patterns needed for the production of the rings is greatly reduced since no attention need be paid to the internal diameter of the ring and only a sufiicient number of patterns to cover the external shape of the ring is required. Y

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming part of this specification, with the understanding, however, thatthe invention is not confined to any strict conformity with the showing of the drawing, but may be changed and modified so long as such changes and modifications mark no material departure from the salient features of the invention as expressed in the appended claims.

In the drawing Figure 1 is a perspective view of a plate and pattern thereon for the production of a ring mold.

Fig. 2 is a perspective view of the reverse side of the plate.

Fig. 3 is a plan view of a ring of different exterior shape from that shown in Fig. 1.

Fig. 4 is a plan view similar to Fig. 3, but showing still another form of ring.

Figs. 5 and 6 are cross sections of the patcation is limited to the pattern, wherefore the mold in which the casting is performed is not shown in the drawing of this application.

The invention comprises a relatively thin plate 1 which may be, but is not necessarily, of rectangular form. One edge 2 of the plate is beveled and in the edge opposite from the beveled edge and about midway of the width of the plate there is formed an erongated entering slot 3 having the long sides beveled, as indicated at 4:, the bevel of one side being opposite to that of the other side of the slot.

Located about midway of the length and breadth of the plate 1 is a pattern 5 representing about one-half of the axial length of a complete finger ring or other like device. For simplicity of description it will be considered that the pattern is for a finger ring without, however, limiting the pattern to such specific construction. The slot 3 is of a length to extend from the finger ring pattern 5 to the adjacent edge of the plate 1, its purpose being to receive a gate mold and anchor the plate 1 in a larger plate so that the plate 1 may be readily interchanged with other plates containing patterns differing from each other. The plates 1 are all alike so that they may be readily interchanged, while the finger ring patterns or half patterns may each vary from the other. For instance, in Fig. 1 there is shown a finger ring pattern 5 of one form. In Fig. 3 there is shown a finger ring pattern 5 of another form; in Fig. 4 there is shown a finger ring pattern 5 of still another form, and in Figs. 7 and 8 there are shown finger ring patterns 5 and 5 of still other forms.

On the back of each plate 1 there are indicia 6 which may represent the ring number of the pattern and the weight of the ring for which the pattern is designed. In actual practice it is customary to make band ring models in six widths, With each Width in seven diiiferent Weights, these covering all that are ordinarily in use.

With the invention the internal diameter of the pattern, irrespective of the Width and Weight of the ring to be produced, is the same in all the patterns, thereby greatly reducing the number of patterns needed. To provide the diiierent internal diameters that are usually kept in stock the ring, after being finished, is stretched by a ring stretcher instead of being initially cast in the different diameters.

What is claimed is 1. In ring casting apparatus, interchangeable ring patterns of different Widths and each representing approximately one-half the Width of a completed ring, all the pat terns being of the same internal diameter.

2. In ring casting apparatus, interchangeable plates each with a ring pattern in relief on one face and the patterns of difierent Widths and Weights, each pattern representing approximately one-half of the Width of the completed ring, and all the patterns being of substantially the same internal diameter, whereby all the rings made from the different patterns have initially the same internal diameter and may be subsequently stretched to larger diameters.

In testimony whereof I ailix my signature.

ALFRED WENDT. 

